Synoptic to large-scale drivers of minimum temperature variability in Australia - long-term changes

2017 ◽  
Vol 38 ◽  
pp. e237-e254 ◽  
Author(s):  
Steven Crimp ◽  
Neville Nicholls ◽  
Philip Kokic ◽  
James S. Risbey ◽  
David Gobbett ◽  
...  
Keyword(s):  
Minimum Temperature ◽  
Large Scale ◽  
Temperature Variability ◽  
Long Term Changes

scholarly journals Comparison and assessment of large-scale surface temperature in climate model simulations

2019 ◽  
Vol 5 (1) ◽  
pp. 67-85
Author(s):  
Raquel Barata ◽  
Raquel Prado ◽  
Bruno Sansó
Keyword(s):  
Surface Temperature ◽  
Seasonal Changes ◽  
Large Scale ◽  
Climate Model ◽  
Internal Variability ◽  
Temperature Variability ◽  
Data Driven ◽  
Model Simulations ◽  
Climate Model Simulations

Abstract. We present a data-driven approach to assess and compare the behavior of large-scale spatial averages of surface temperature in climate model simulations and in observational products. We rely on univariate and multivariate dynamic linear model (DLM) techniques to estimate both long-term and seasonal changes in temperature. The residuals from the DLM analyses capture the internal variability of the climate system and exhibit complex temporal autocorrelation structure. To characterize this internal variability, we explore the structure of these residuals using univariate and multivariate autoregressive (AR) models. As a proof of concept that can easily be extended to other climate models, we apply our approach to one particular climate model (MIROC5). Our results illustrate model versus data differences in both long-term and seasonal changes in temperature. Despite differences in the underlying factors contributing to variability, the different types of simulation yield very similar spectral estimates of internal temperature variability. In general, we find that there is no evidence that the MIROC5 model systematically underestimates the amplitude of observed surface temperature variability on multi-decadal timescales – a finding that has considerable relevance regarding efforts to identify anthropogenic “fingerprints” in observational surface temperature data. Our methodology and results present a novel approach to obtaining data-driven estimates of climate variability for purposes of model evaluation.

scholarly journals Dalkurd FF

2020 ◽  
Vol 29 (supl) ◽  
pp. 105-113
Author(s):  
Tiago Duarte Dias
Keyword(s):  
Large Scale ◽  
First Year ◽  
Football Club ◽  
Local Institution ◽  
Long Term Changes ◽  
Short And Long Term ◽  
The City ◽  
Do So

As the whole world struggles with the appearance of a large-scale pandemic, individuals and institutions begin to cope with the perspective of both short and long-term changes to their plans. What had been planned out by many during January and February of 2020, no longer became feasible already during the following months. Thus, with the impossibility of knowing for how long this situation will persist, both individuals and institutions have changed their plans with a focus on when the situation will reverse to a degree of normalcy. This article aims to briefly understand and analyses the strategies centered around a Swedish football club founded by Kurdish individuals regarded to the consequences of the coronavirus crisis in the country. Both fans and employees at the club have changed their strategies regarding the first year they would be playing in their new hometown of Uppsala. The author will argue that, although, the crisis has changed their strategy and hampered their plans of becoming a local institution, it has not, in fact, changed their plans to be an integrated part of the city, but it has provided the club with newer opportunities to do so.

scholarly journals Global large-scale stratosphere-troposphere exchange in modern reanalyses

2016 ◽  
Author(s):  
Alexander C. Boothe ◽  
Cameron R. Homeyer
Keyword(s):  
Large Scale ◽  
Lower Stratosphere ◽  
Radiative Properties ◽  
Lapse Rate ◽  
Polar Regions ◽  
Transport Mechanisms ◽  
Upper Troposphere ◽  
Long Term Changes ◽  
The Tropics

Abstract. Stratosphere-troposphere exchange (STE) has important and significant impacts on the chemical and radiative properties of the upper troposphere and lower stratosphere. This study presents a 15-year climatology of global large-scale STE from four modern reanalyses: ERA-Interim, JRA-55, MERRA-2, and MERRA-1. STE is separated into four categories for analysis to identify the significance of known transport mechanisms: 1) vertical stratosphere-to-troposphere transport (STT), 2) vertical troposphere-to-stratosphere transport (TST), 3) lateral STT (that occurring between the tropics and the extratropics and across the tropopause "break"), and 4) lateral TST. In addition, this study employs a method to identify STE as that which crosses the lapse-rate tropopause (LRT), while most previous studies have used a potential vorticity (PV) isosurface as the troposphere-stratosphere boundary. PV-based and LRT based STE climatologies are compared using the same reanalysis output (ERA-Interim). The comparison reveals quantitative and qualitative differences, particularly in the geographic representation of TST in the polar regions. Based upon spatiotemporal integrations, we find STE to be STT-dominant in ERA-Interim and JRA-55 and TST-dominant in the MERRA reanalyses. Time series during the 15-year analysis period show long-term changes that are argued to correspond with changes in the Brewer-Dobson circulation.

scholarly journals Tracking Long-Term Changes in Global Sea Level Extremes

Eos ◽  
2016 ◽  
Author(s):  
Sarah Stanley
Keyword(s):  
Climate Change ◽  
Sea Level ◽  
Large Scale ◽  
Long Term Changes ◽  
Global Sea Level

Large-scale climate change may drive trends in extreme sea level events.

scholarly journals Data integration for European marine biodiversity research: creating a database on benthos and plankton to study large-scale patterns and long-term changes

Hydrobiologia ◽  
2010 ◽  
Vol 644 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Leen Vandepitte ◽  
Bart Vanhoorne ◽  
Alexandra Kraberg ◽  
Natalie Anisimova ◽  
Chryssanthi Antoniadou ◽  
...  
Keyword(s):  
Data Integration ◽  
Large Scale ◽  
Marine Biodiversity ◽  
Biodiversity Research ◽  
Long Term Changes
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